To Map Genes of a Bacterial Strain, Conjugation Must Be

question 20

Multiple Choice

To map genes of a bacterial strain, conjugation must be interrupted at given times. Suppose you have Hfr cells of genotype a+b+c+d+e+strR and F- cells of genotype a- b- c- d- e- strS and you combine these two cultures in liquid medium in four blenders at time 0. After intervals of 3, 6, 9, and 12 minutes, you turn on successive blenders. The resulting cultures were then plated on medium containing streptomycin. Why?

• A) to eliminate non- conjugating Hfr cells
• B) to selectively eliminate cells that have taken in F⁺ genes
• C) to eliminate non- conjugated F^- cells
• D) to eliminate all non- conjugated cells

Understand key events and figures in the civil rights movement of the 1950s and 1960s.

Recognize the significance of landmark civil rights legislation and Supreme Court decisions.

Identify strategies and philosophies that shaped the civil rights movement.

Acknowledge the role of individual and collective action in challenging racial segregation and discrimination.

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The supply and demand for workers within a specific region or area, affecting employment and wages.

Host Country

The country in which a multinational company operates a facility, as opposed to the country where the company is headquartered.